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comparison usr/src/cmd/devfsadm/lofi_link.c @ 0:c9caec207d52 b86

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Initial porting based on b86
author Koji Uno <koji.uno@sun.com>
date Tue, 02 Jun 2009 18:56:50 +0900
parents
children 1a15d5aaf794
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-1:000000000000 0:c9caec207d52
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "@(#)lofi_link.c 1.5 06/10/02 SMI"
27
28 #include <regex.h>
29 #include <devfsadm.h>
30 #include <stdio.h>
31 #include <strings.h>
32 #include <stdlib.h>
33 #include <limits.h>
34 #include <sys/mkdev.h>
35 #include <sys/lofi.h>
36
37
38 static int lofi(di_minor_t minor, di_node_t node);
39 static int lofi_rm_all(char *link);
40
41 /*
42 * devfs create callback register
43 */
44 static devfsadm_create_t lofi_create_cbt[] = {
45 { "pseudo", "ddi_pseudo", LOFI_DRIVER_NAME,
46 TYPE_EXACT | DRV_EXACT, ILEVEL_0, lofi,
47 },
48 };
49 DEVFSADM_CREATE_INIT_V0(lofi_create_cbt);
50
51 /*
52 * devfs cleanup register
53 */
54 static devfsadm_remove_V1_t lofi_remove_cbt[] = {
55 {"pseudo", "^r?lofi/[0-9]+$", RM_ALWAYS | RM_PRE | RM_HOT,
56 ILEVEL_0, lofi_rm_all},
57 };
58 DEVFSADM_REMOVE_INIT_V1(lofi_remove_cbt);
59
60 /*
61 * Wrapper around devfsadm_rm_all() that allows termination of remove
62 * process
63 */
64 static int
65 lofi_rm_all(char *link)
66 {
67 devfsadm_rm_all(link);
68 return (DEVFSADM_TERMINATE);
69 }
70
71
72 /*
73 * For the master device:
74 * /dev/lofictl -> /devices/pseudo/lofi@0:ctl
75 * For each other device
76 * /dev/lofi/1 -> /devices/pseudo/lofi@0:1
77 * /dev/rlofi/1 -> /devices/pseudo/lofi@0:1,raw
78 */
79 static int
80 lofi(di_minor_t minor, di_node_t node)
81 {
82 dev_t dev;
83 char mn[MAXNAMELEN + 1];
84 char blkname[MAXNAMELEN + 1];
85 char rawname[MAXNAMELEN + 1];
86 char path[PATH_MAX + 1];
87
88 (void) strcpy(mn, di_minor_name(minor));
89
90 if (strcmp(mn, "ctl") == 0) {
91 (void) devfsadm_mklink(LOFI_CTL_NAME, node, minor, 0);
92 } else {
93 dev = di_minor_devt(minor);
94 (void) snprintf(blkname, sizeof (blkname), "%d",
95 (int)minor(dev));
96 (void) snprintf(rawname, sizeof (rawname), "%d,raw",
97 (int)minor(dev));
98
99 if (strcmp(mn, blkname) == 0) {
100 (void) snprintf(path, sizeof (path), "%s/%s",
101 LOFI_BLOCK_NAME, blkname);
102 } else if (strcmp(mn, rawname) == 0) {
103 (void) snprintf(path, sizeof (path), "%s/%s",
104 LOFI_CHAR_NAME, blkname);
105 } else {
106 return (DEVFSADM_CONTINUE);
107 }
108
109 (void) devfsadm_mklink(path, node, minor, 0);
110 }
111 return (DEVFSADM_CONTINUE);
112 }